Sawdust-burner



(No Model.)

F. W. COOKY SAWDUST BURNER.

110. 421,555. Patentedfeb'. 18, 1890.

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N. PETERS. Phwumngmphar, wnshingmv D42.A

UNITED STATES ATENT OFFICE.

FREDERICK WV. COOK, OF SAN FRANCISCO, CALIFORNIA.

SAWDUST-BURNER.

SPECIFICATION forming part of Letters Patent No. 421,555, dated February18, 1890.

Application filed April 6, 1889. Serial No. 306,234.

To @ZZ whom, t may concern,.-

Be it known that I, FREDERICK W. CooK, of the city and county of SanFrancisco, State of California, have invented an Improvement inSawdust-Burners; and I hereby declare the following` to be a full,clear, and exact description of the same.

Myinvention relates to the class of burners for disposing of refuse,more especially of sawdust; and my invention consists in a fire-wallpreferably in the shape of a semicircle, and partially inclosing a spacewithin which lthe sawdust is fed, and in connection with said wall ablast-pipe with connected iiue under the charge of sawdust, and providedwith backwardly-directed exit-apertures, whereby the Hue is preventedfrom becoming clogged and the wall is not subjected to intense heat.

My invention further consists, in connection with said wall and blastapparatus, of a car rier for conveying the sawdust to the top of thewall, and a chute for depositing` it within the space partially inclosedby the wall, all of which I shall hereinafter fully describe.

The object of my invention is to provide a device for burningsawdust,which shall be of a durable character and efficient inoperation.

Referring to the accompanying drawings, Figure 1 is a plan of my burner,the blast-flue being shown in horizontal section. Fig. 2 is a verticalcenter section. Fig. 3 is a rear elevation.

A is awall,which is here shown as made of stone, though it may beconstructed of any suitable fire-resisting material, stone beingpreferred as being more economical and available in most cases andanswering every purpose. The shape of the wall is semicircular, therebyleaving its entire back open, and in order to protect it from the windit is best to build it against the face of a hill orl other elevation,either natural or artificial, the hill being here shown by B.

C is a pipe or channel, which is connected at its outer end with theblower D, and its inner end passes in through the front of the wall atthe bottom and connects on the inside, or behind the wall,with the flueE, made of iire-brick or iire=clay and occupying aradial plane withrelation to the wall. This flue E has at its inner end a cross-flue F,made of (No model.)

similar material, which said cross-Hue has apertures f, extendingbackwardly-that is to say, toward the open back of the wall.

G is a section'of fire-lining made on the inner surface of the center ofthe stone wall A.

II is a traveling carrier of any suitable construction, one end of saidcarrier being supposed to be in connection with the sawdustdump,wherebyit may be readily loaded, and the other end being in communication withthe chute I at the top of the wall and which extends downwardly into thespace inclosed by the said wall, said chute being shaped, as shown inFig. 3, with a iare toward the bottom, so as to properly distribute thesawdust within the space behind the wall. The carrier here shownconsists, simply, of an endless chain provided with transversescrapingboards passing over a platform, whereby the sawdust is scrapedor carried up the incline.

The operation of the burner is as follows: The sawdust is carried up bythe carrier and discharged into the chute, by which it is directeddownwardly into the space behind the wall A and over the wind-flue F.The blast of airis directed through the pipe or passage C and intoiandthrough the iiues E F, emerging backwardly from the exitapertures f anddirectly under the mass of sawdust above. As the pile burns down itsinks and crumbles away, while fresh supplies are fed from the top. Theposition of the exit-apertures f in the cross-iiue is such that they arenot liable to become choked with the sawdust, as they would if they werein the top of the iiue; nor do they concentrate heat in such a way as toburn out the apparatus, as they would if they` 1o back and directedtoward the open back of the Wall, and the blower connected with theouter end of the air-blast pipe, substantially as desoribed.

In Witness whereof I have hereunto Set my hand.

FREDERICK W". COOK.

Vitnesses:

S. Il. NOURSE, Il. C. LEE.

